error message for age chichi summer

I got a notification for a tag that I subscribe to and when I clicked on the link I'm sent to https://www.fakku.net/manga/age-chichi-summer-english

just wondering if its a bug or something

This happens when the title of the upload is changed, which causes the URL to change as well. Here are the actual links:

https://www.fakku.net/manga/high-spirited-summer
https://www.fakku.net/manga/high-spirited-breasts-english